I have a bug in my graphics engine. When certain sprites are displayed or when I pan the view across the map, spurious graphics are displayed in my game window. When I try to do a screen dump to capture the spurious behavior I am unable to do so. The captured image is perfect. If I attempt to pause my render loop while the spurious graphics are displayed, the paused image never contains the spurius images. I have used every debug method I know to figure this out but to no avail. I have gathered detailed, cycle based stats from my engine while the bug is evident but have found no anomalies. The problem is much more prevalent in my release model. Also print statements tend to hide the problem as well. Placing a Sleep(10) in my render loop also greatly eliminates the problem. So it appears to be timing related. Is this problem related to a synchronization issue in accessing vertex buffer? Or perhaps related to monitor syncing? But most of the graphics are not affected. I am using Visual C++ 2005 Express and dx9. (The problem is also evident with my older code developed with Visual C++ 6.0.) Does anybody have any ideas? Thanks,